Vacuum cleaner



FIG. 1 is a top perspective view of a vacuum cleaner showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a right side thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a top view thereof; and,

FIG. 8 is a bottom view threof. 

The ornamental design for a vacuum cleaner, as shown and described. 